The question asks to identify the correct term for compounds composed solely of carbon and hydrogen. We need to recall the definitions of the given options in organic chemistry.
Based on these definitions, "Hydrocarbons" is the correct term.
Correct Option: D) Hydrocarbons — These are organic compounds made up of only carbon and hydrogen atoms.
The question asks to identify the class of hydrocarbons that contain only single covalent bonds between carbon atoms. This requires knowledge of the basic classification of hydrocarbons based on the type of bonds present between carbon atoms.
Correct Option: A) Alkanes are hydrocarbons that contain only single covalent bonds between carbon atoms. They are saturated hydrocarbons.
The question asks for the general formula of alkenes, which are hydrocarbons containing at least one carbon-carbon double bond. We need to recall the definitions and general formulas for different classes of hydrocarbons.
B) CnH2n is the general formula for alkenes (hydrocarbons with one carbon-carbon double bond). This formula indicates that for every carbon atom, there are two hydrogen atoms, reflecting the presence of one double bond which reduces the number of hydrogen atoms by two compared to a saturated alkane.
The question asks for the general formula for alkynes. Alkynes are a class of hydrocarbons characterized by the presence of at least one carbon-carbon triple bond. The general formula for a homologous series can be derived by considering the number of carbon and hydrogen atoms in the simplest members of the series.
Therefore, the general formula \( \text{C}_n\text{H}_{2n-2} \) correctly represents alkynes.
A) \( \text{C}_n\text{H}_{2n-2} \) is the general formula for alkynes. Each triple bond reduces the number of hydrogen atoms
The question asks to identify the homologous series to which Ethyne (acetylene, Câ‚‚Hâ‚‚) belongs. This requires understanding the general formulas and characteristics of different homologous series in organic chemistry.
Correct Option: B) Alkynes. Ethyne (acetylene) has the formula Câ‚‚Hâ‚‚, which corresponds to the general formula for alkynes, \( \text{C}_n\text{H}_{2n-2} \), where \( n=2 \).
The question describes a specific characteristic of organic compounds where members of a series share the same functional group, differ by a \(\text{CH}_2\) unit, and have similar chemical properties. We need to identify the correct term for such a series from the given options.
D) Homologous series — This term accurately describes a series of organic compounds where successive members differ by a \(\text{CH}_2\) unit, share the same functional group, and exhibit similar chemical properties.